Theoretical innovation on stairwell pressurization technology

Aiming at the issue of air volume regulation and pressure relief (collectively referred to as ‘compensation’) for pressurized air supply systems in stairwells, this paper briefly reviews the revisions and updates of the smoke control section in six editions ofASHRAEhandbook—HVACapplicationssince 1999, as well as the theoretical innovations and technical content adjustments based on the progress of relevant research on this issue. Combined with the domestic reality, several problems in the process of implementing the relevant provisions of GB 51251-2017Technicalstandardforsmokemanagementsystemsinbuildingsare analysed and suggestions for improvement are put forward.